Power-shovel dipper



Dec. 7,'1926.

, POWER SHOVEQADIPIVER Patented Dec. v7, 1926.

EItICH H. 'IIICHTENBERGB 0F MILWAKEE,

WISCONSIN, ASSIGNOR TO KOEHRIN'G GOM- PANY, OF MILWAUKEE, WISCONSIN, A CORPORATION.

POWER-SHOVEL DIPPER. l.

l l.Application filed August This invention has 'to do with power shovels and appertains primarily to-the 'construction of the dipper commonly used 'on such .shovels,-and to the lifting connections for. the dipper which ordinarily embody the principal part-scomprising the*v .dipper lhandle and l padlock block which carries what is usually known as the p'adlock sheave.

The `spcialobjects of the present `invenlortion have been to produce a dipper structure which is more rigid rin its connections with the' lifting parts, namely', the handle and padlock block, whereby the breakage of the connection between the padlock block 1.5 and thedipper is avoided; whereby the back of the dipper may be made less heavy than Vheretofore. necessary owing to the fact'that theload or pullof the lifting connection between the padlock block and thef-dipper, is 2 distributed entirely across the back of the dipper, orV practically so. Again, by my present construction the dipper handle and the padlock block have` a common connection "with the back of the .dipper for which purpose I utilize a-hardened pin mounted in a stationary manner'fin the spaced bearing lugs on the back of the'dip'per which lugs afford the extended 'bearing connectionbe` tween the lifting padlock` block and the said dipper. 0

.The invention -additionally involves a genl .eral specific constructionof padlock block `t earing 1;".lugv formation land linkage, al1 vof which maybe understood upon reference 'to the following description 'in conjunction with the accompanying drawings in which: 4

' Figure 1 is a,gs ide eleva'tionview of. a

l shovel dipper embodying the invention. the'v dipper handle being broken away 'las well as f y i cilitating the adjustment of the parts 7 and Buon the casting 5 may be either in the cast" 40 the hoisting cable and other parts.

Figure 2is a' .view in elevation of the body vlof thepadlock'block showing theangular relation of the sheave axis tothe lower hinge Figure 3 isanother iviewioifjhepadlock block taken` about at a right angle td-the- View of Figure 2.l x t l :Figure 4 is a. plan view-ofthe back of the A dipperpshowing the connections between the 59 padlock' block and dipper inl section, similarly/showingi-the'linkage parts.v

1, 1925. l serial No. 43,442.

ferring to the drawings, it willbe seen that i in a general way the dipper A is of somewhat conventional construction embodying the bottom dump'door 1, the usual teeth 2;.

and dipper handle 3. Thedipper handle 3 l -is Very rigidly connected with the back 4 of the dipper.A '.by"means of a casting 5 formediwith lugs adapted to enter the. spaces between the lugs 6 on the dipper back, suitable pins 6a being inserted in order to properly connect the parts 5 and l6 together.

back'4; of the dipperA and project upwardly `angle thereto. The connecting pins 6 inter--l mediate theparts 5. and -6 'and the :connecting :pin `9 .intermediate the` parts 4'7 vv'and 10, provide a'v very rigid-'attachment means for securing the handlen tovthejdipper and the to vary the angle at which the handle 3 ex-V tends. from the dipper. l

It is obvious that the openings -for fanecting lugs yl() which are integral with t-he The foregoing sets forth the connection from said .back at approximately an 4obtuse v links 7 permit 'of adjustment of thesev parts ing 5 or in the links 7 this being immaterial.

-..The lugs -10 are disposed at intervals over practically the entire 'width of the back et of the dipper A and these lugs receive the pin 9 which is'mounted in the lugs so that the pin is held stationary against rotation. Referring -now to the padlockblock which is designated 11, it is notable that ythis block lob comprises a casting having a hollow sector- Shaped sheaveguard 12, the body-of the block being attached at its upper end to the dead end 13 of the hoisting cable 14 which passes around the pulley or sheave 15 suitably mountedzin self aligning bearings i 16 centrally of the body of the block. At I its lower vend, the block 11 is widened out as shown at 11a and formed with a series of connecting' lugs 16. The portion 11a of the block 11. isy of a length substantially equal to the width ofltheback 4 of the dipper and the lugs 16 are disposed in pairs near opposite ends of the said widened portion 11a. The lugs 16 are provided withopenings equipped with suitably hardened bushings 15, 18 and'said lugs receive the pin 9 which, as

previously described, forms the connection between the links 7 and the lugs 10. i

' It will be observed from Figuresand 3 of the drawings particularly' that thesheave o is positioned angularlv with reference to the body of the sheave block and this serves an important function in connection with the construction of this device.' The angular position of the sheave guides the hoisting n cables by bringing the periphery at one side of the sheave in alignment with the periphery of one of the sheavesat the end of the boom and the periphery at the opposite side of the sheave in alignment with the seco ond sheave on the boom, whereby enabling the block to approach verv closely to the end of the boom and eliminating the tendency to twist the hoist connection as experienced with the previous types of sheave block con- 85 nections.A

The back 4 also has the pivot lugs 19 which cooperate withy pivot means for the dumping door 1.

With the foregoing constructionin mind, 40 it is evidentthat the lifting stress of the padlock block 11 isjsodistributed across the back 4 of the dipper A that I am enabled to makefsaid back of lighter metal structure than has been possible heretofore ,when the lifting stresses of the padlock block when hoisted have been concentrated practically at the center portion of the back 4.

ln the digging operations` with such construction, when rock or other solid objects are encountered. verv considerable strains are imposed upon the dipper stick and this center connection particularly, attimes suiiicient to shear off the pins. The rotary or torsionalv stresses to which it is submitted. 5 cause very quick wear. necessitating replacement of the pins. Ready renewal of the lugs -of course ispractically precluded. With the connection extending across the` wall and within thc contines of the sides as herein de scribed, these diiiiculties are greatly' minimized.

Additionally it is obvious that by the method of construction of the part- 11a of the block 11, and the use of thepin 9 of extended length in conjunction with the lugs 10, the

liability of breakage of the block due to tilting of the dipper causing special side strains upon the block is eliminated.

Recapitulating the advantages of my construction it is noted that the ordinary type of bail commonly used with padlock blocks is entirely done away with'. It is found in practice that said bail when fastened to the side plates of the dipper is not of advantage because the said side plates have more or less flexibility and the objective in a digging device of the type of `the shovel dipper is to have the dipper rigidly connected with its lifting means. t y With my so-called spreader tvpe of padlock block, the hoisting stresses are carried uniformly across the dipper back, whereasv in the usual`p'adlock block. the stresses are imposed at-the center of the dipper, or if the bail type is used said stresses are imposed S' at each edge of the back.

Under the latter conditions, the hoisting load passes up through the rivetswhich fasten the dipper plates to the back, therebyimposing upon these rivets unnecessary stresses. l

lVith my method of connecting the padlock block to the back of the dipper a greater digging effort is obtainable because the angle of opening between the hoist line and the dipper sticks is greater for the average condition of working. Again with my dipper t. construction all of the hinged parts are connected directly to one unit namely the back of the dipper and by dispensing with the bail type connection the dipper lift cuts they clearance for the dipper at all points instead of the bail doing certain of this work for which it is of course not designed.

`llVith my spreader block padlock construction the connection with the dipper forces the latter to dig in a straight line, eliminating the lusual rotating action whenv digging from the corner of the dipper, a said feature of the ordinary types struction.

Having thus described my invention what l claimas new and desire'to cover by Letters Patent is :F- .v

1.1n shovel dipper construction. in combination` a dipper provided' with a back havotL dipper con- 110 ying a series of lugs arranged at intervals substantially the entire width of the back, and a padlock block adapted to receive the hoisting padlock sheave and comprising a body widened to provide a portion of substantially the width of the back and having connecting lugs to cooperate with the corresponding liigs of the back,`and a pin coeXtensive in length withA the area over which said connecting lugs are disposed and passingthrough the lugs of the padlock block and those of the back for the purpose set forth.

2. ln 'shovel dipper-construction, in combination, a dipper provided with a back havi3 widened to provide' a portion of substantially' ing a series of lugs arranged 'atintervals substantially the entire width of the back, and a padlock block adapted to receive the hoisting padlock sheave and comprising a body thefwidth of the back and having connecting'I lugs to cooperate with the corresponding lugs of the back', and a pin coextensiye inl length with the area over which said'connecting vlugs are disposedand passing through the lugs of the padlock block and,

those of the back for the purpose set forth,

the said lugs of the block and dipper backl being provldedA with hardened 'bushings to' receive the pin which ishardened and disposed so. as to remain stationary with means connecting said lugs together.

3.- Inv shovel dipperV construction, in combination, a dipper4 provided with al backi '20 -having a series of lugs arranged at intervals substantially the entire width of the back,

and a padlock 'block `adapted to-receive; the

hoisting padlock sheave4 and comprising? a body widenedy to provide a portion of substantially the width ofthe back and having connecting lugsto cooperate with the vcorresponding lugs ofthe back, and a pin coextensive in length with the-area oyer Which said connecting lugs are disposed and pass- '30- ing through ,the `lugs vof the padlock block comprising* link parts ,attached to the upper Yportion of the handleand engaging the said pin which connects the lugs of the block with the lugs of the back.'` e

4, In'cornbination, a shovel dipper, a.han'

dle therefor connected with the dipper at the back portion ofthe latter, the dipper comprising a back having lugs dispo-sed at intervals substantially acrossA its entire width, a padlock block having its lower por- A.tion widened so astovbenearly as wide'- as the dipper body formed with lugsat said widened portion for connection with the dipper body, -and a pintle pin passing `through the lugs of the dipper back and those of the block and establishing a con. nection there between. and parts connecting;

said pin and the handle of the dipper substantially as described.

5. In, shovel dipper construction. a dipper comprising the bottom. sides and back. .a

padlock sheave block for hoisting the dip-r` per and comprising aconnection composed of connecting elements arranged substantially entirely across, and engaged with thel back of the dipper.

6. In shovel dipper construction` in combination. a dipper comprising bottom, sides and back, the back having connecting lugs near the .bottom and near the sides for connection with a dipper handle, a dipper handle connected with the said lugs the bottom adjacent to said connecting lugs for the dipper handle connection, a padlock block having a connecting portion for attachment to the backv of the dipper `formed with connecting lug means disposed over an area.

substantially'the same as the width of the back, and apivot connection between said vback and. said padlock block lug means.

7. `As a new article of manufacture, a back for shovel dippers-co'mprising spaced apertured lu'g connecting means near its bottom edgeand adjacent to its side edges, a series of pivoting lugs integraltherewith and disposed at intervals across said back lfor the dipper being pivoted-to the back near its upper edge portion' and arranged substantially entirely across said back for connection with a padlock sheave block, and dumping door pivot lugs carried by said back between the previously mentioned sets 0f lugs, for attachment of a dumping door to the back.

8. In combination, a shovel dipper, a handle therefor, a padlock sheave block, and a connection between the block and the upper portion of the b'ack of the dipper including rigid connecting elements arranaedsothat the lifting stresses created thereby incldent to' hoisting of the dipper by the block are distributed entirely across the ysaid back of the dipper.

9. In combination, a shovel dipper. a han- .dle therefor, and a-hoisting connection for the dipper connected to a transverse wall of the latter at apoint at each side of the median axis, said points being spaced from said :axis a substantial distance to effectively resist rotary or torsional stresses.

10, Inv combination, a shovel dipper. a

vhandle therefor. and a sheave block having a `connectionwith the upper part of the dipper at points specifically spaced from the.' `median axisand within the confines of the side walls to resist rotary and torsional .stresses on the dipper.

11.,In a shovel crane. in combination, a

dipper. a dipper handle therefor, hoisting means for the dipper for 'raising and lowering the same as the, handle is crowdedV out or, racked in. and a connection betweenthe back of the dipper and Said hoisting means 'including elementsi'attached to the dipper between planes coincident with the sides thereof and suliiciently spaced apart so that the stresses created by the hoisting connection when in operation `are distributed a considerable distance across the dipper back to prevent breakage or undue wear on the said elements. l

12. In combination, a shovel dipper, a handle therefor and a sheave block,having a pivot connection withtheedip'per at one end anda hoisting 4connection at its other end, the sheave axis being angularly relate/ciw tohe axis of the pivot connection aforesal 13. In a shovel crane, a dipper and handle therefor, a boom, sheaves on Said boom, a

5 hoisting cable, a sheave block having oonnection with the hoisting cable at one end and a pivot'connection With the dipper at its other end extending transversely of the slipper, said block having its sheave mounted on an axis angularly related to the axis of said transverse connection With the dipperand said boom sheaves.

In testimony whereof I affix my signature.

ERICH H. LICHTENBERG. 

